Add test confirming issue #185.

test/erlydtl_test_defs.erl

@@ -687,6 +687,12 @@ all_test_defs() ->
        {"|pluralize:\"y,es\" (list)",
         <<"{{ num|pluralize:\"y,es\" }}">>, [{num, 2}],
         <<"es">>},
+       {"|length|pluralize",
+        <<"{{ list|length|pluralize:\"plural\" }}">>, [{list, [foo, bar]}],
+        <<"plural">>},
+       {"|length|pluralize",
+        <<"{{ list|length|pluralize:\"plural\" }}">>, [{list, [foo]}],
+        <<"">>},
        {"|random",
         <<"{{ var1|random }}">>, [{var1, ["foo", "foo", "foo"]}],
         <<"foo">>},